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钻孔桩基础是铁路桥梁建设中最普遍的基础形式和处理方法,桩基施工的质量好与坏直接影响整个工程的质量和安全。钻孔桩质量检测最常用的方法是小应变法,分析了混凝土桩小应变法质量评定的相关问题;对合武铁路举水河特大桥9号墩桩基础的实测曲线进行了具体分析,并提出了相应的施工对策,此研究成果在合武铁路客运专线桥梁建设中取得了良好的效果并得到了广泛的应用。
Bored pile foundation is the most common foundation form and treatment method in railway bridge construction. The quality of pile foundation construction is good or bad, which directly affects the quality and safety of the whole project. The most commonly used method to measure the quality of bored piles is the small strain method. The problems related to the quality assessment of small-strain concrete piles are analyzed. The actual measured curves of pile foundation of No. 9 Jushuihe Bridge are also analyzed. The corresponding construction measures are put forward. The research results have achieved good results and been widely used in the bridge construction of the passenger line of the combined railway.